Blackboard hanger



Dec. ll, 1928. 1,694,433 G. G. ALBERT BLAC KBOARD HANGER Filed Nov. 1:1, 1927 H TN' l Georgi lllflmm Patented Dec. l1, 1928. l

usarse stares GEORGE G. ALBERT., F BANGOR, Yl?:ENNSYLVANIA.

BLACKBOARD HANGER;

Applicatonkled November 11, 1927. VSerial No. 232,657.

This invention relatesto a hanger .designed primarily for holding slateblackboards, one of the objects being to provide a simple and efficient device which can be easily positioned so as to provide a firm b earing for the slate and to insuretight joints between the black- -boards with the outer surfaces of the boards properly alined to provide a smooth vunbroken area. Y

A further object is to provide a structure of this character which will hold the blackboards rmly at all times so that they will not work loose and rattle, as is frequently the case where blackboards are mounted by Vmeans now in use.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that chang-es Sin the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings, the preferred form of the inventionlias been shown.

In said drawings, t t

Figure l is a front elevation of a portion of a blackboard held in position by means of the attaching devices constituting the present invention.

Figure 2 is a side elevation of one of the strips employed forholding the exposed end of the blackboard in place.

Figure 3 is a'section on line 3-3, Figure l. v

YFigure 4. is an enlarged section on line *Lk-Figure l.

. Figure 5 is an 'enlarged section on line 5 5, Figure 1. f y Figure 6 is a perspective view of'one of the clamps used.

Figure 7 isa front elevation of the holdin-.g

strip, the middle portion thereof being broken away. Y l Referring to the figures by characters of reference 1 designates a fiat metal strip liaving retaining hooks'Q at the ends thereof adjacent one edge, these hooks being so located that when a slate blackboardB is placed with .oneedge resting on the strip l'the upper and lower edges thereof will be lapped and firmly .engaged by these hooks. :A stop 3 extends from thejplate or strip lata pointbetween its ends for engagementwith the edge of the blackboard B and this stop has a'fiiange l designed to-lap the outer surface of the blackboard and hold it firmly to the strip or plate l.

Another elongated metal strip 5 is adapted to be used back of the meeting edges of two blackboards, this strip 5 having its end por tions offset forwardly'as indicated at 6, the lower oset portionbeing provided with a supporting hook 7 preferably integraltherewith and constituting a rest for themeeting ends ofthe blackboards B. The upper offset portion 6 is detachably engagedV by an angular clamp 8 which can be held in place by any suitable fastening means and is adapted lto firmly engage the upper edges ofthe boards B where they Vcome together. This clamp 8 and the supporting hook 7 are spaced apart a vdistance equal tothe height of the boardsso that when the boards are properly engaged thereby they will be held against up and down movement. The intermediate portion of the strip 5 constituting one of the attaching members has threaded apertures therein at desired intervals as shownat 9,*these apertures being arranged in pairs, the apertures of each pair being lat opposite* sides ofthe longitudinal center of the strip. In each aperture is located a screw lOengagedfby a nut 11. v These screws are designed to be adjusted so as to engage the back surfaces ofthe respective boards By after which they are held against retrograde movement by tightening the nuts 1l. The screws and nuts on the end holding strips can be adjusted approximately to` properly eng-age the adjacent board B and said'boa'rds vcan then be set upinto'position. Thereafter should it be found that the boards are not'properly backed by the screws, said boards can be removed, the screws readjusted to 4provide the proper backing, and the boards again set up intoplace. Thus the two boards vB will be provided withy an unyieldingy backing at regular intervals adjacent the meeting Y -edges of the boards so that after the boards yhavebeenproperly alined and backed, they :will .be held against relative movement `and with their exposedfaces flush. As the boards Qareheldsolely bymetal, there is no danger Vof, v the fastening` means working loose relar tive Ito 'the boards and .causing them to rattle or yield in any'` direction while in use.,l The strips 5 A,can be attachedto any kind of a background.' in the structure illustrated the offset ends have been shown attached to wooden strips S attach-ed to the wall structure W having the usual 'plaster covering P. If'desired a suitable filler of cement can be applied to the strips 5 and l before the boards are erected so as to be compressed by the boards when placed in position. rlhus, when the cement sets, it will provide a further backing for the boards. Also, if preferred, all of the spaces between the strips can be either partlyvor entirely filled with cement. This will Vbe compressed by the boards when erected and will then set to afford a further backing for the boards.

Instead of vusing the strips l, all of the strips can be like those shown at 5 in Figures 3 to 5. The form of strip shown in Figure 2 is for use' in corners Vwhere the board is not ordinarily subjected to excessive` backward pressure However, if desired, thesestrips Vcan be provided with screwssimilar to those shown at 10, Such an arrangement is so obvious that it is not deemed necessary to show it.

What is claimed is: V j

l. The combination with blackboards having meeting edges, of an ,elongatedI metal strip extending longitudinally of said edges and lapping the back faces of the boards, a supporting hook at the lower end of the strip engaging the lower edges of the blackboards, a clamp detachablysecured to the upper end of the'strip and engaging the upper edges of the boards, said supporting book and clamp cooperating to hold the blackboards securely against up and down displacement relativel to each other, and means adjustably carried by the strip at a point between the ends thereof for engaging and l backing each of the boards adjacent said meeting edges. l

2. The combinationwith blackboards having meeting edges, of a strip back of said edge extending longitudinally thereof, said strip including an elongated strip of metal, a supporting hook adjacent one end thereof for engaging and supporting thelower edges of the blackboards, a clamp connected to the Vupper vend of the strip for ,engaging and holding theupper edges of the blackboard, said strip having offset end portions constituting bearings for the upper and lower portions respectively Lof the boards, the remaining portion ofthe strip beingspaced from f the boards, l and means adjustably mounted Von the strip for engaging the back faces ofthe boards to hold them against backward displacement relative to each other. y 3. The combination with blackboards having meeting edges, of a strip including an elongated strip of metal offset at its ends to provide bearings for the`upper and lower portions respectively of the. boards, a supporting yhook adjacent the lower end of 'thek strip for engaging and supporting the lower yyielding relative to each' other,l and means upon the screws for holding them against retrograde movement subsequent to adjustment.

4. A spline for blackboards, including an i elongated strip vof metal having forwardly offset end portions constituting rests for the meeting edges of two blackboards, a supporting hook adjacent the lower end of the strip, an angular clamp detachably mountedg on the upper end of the strip, adjusting *elements carried by the strip between the offset ends thereof for engaging and backing the edge portions of blackboards engaged by the strip.

5. The combination with a supporting structure, of an elongated metal strip having forwardly offset ends secured to said structure, a supporting hook upon the lower offset yportion of the strip for engaging and supporting the meeting edge portions of two blackboards, a clamp connected to the upper offset portion of the strip for engaging and holding the upper edge portions of meeting blackboards, that portion of the strip between the offset ends being spaced from the back faces'of the blackboards when in engagement with the strip, and means carried by said intermediate portion for engaging the back face of each blackboard to hold it against backward displacement.

6. The combination withv a supporting structure, a holding member including an elongated metal strip having forwardly offset end portions secured tosaid structure,

blackboards having meeting edges disposed vin front of the strip and bearing against said Y end portions, that porton ofthe strip between the offset endportions beingy spaced from the blackboards,l a supporting hookr upon thel lower yend portion of `the stripv for engaging the lower edges of the meeting blackboards, a clamp upon the upper end portion of the spline for engaging the upper edge portions of the meeting blackboards,

Vbolts adjustably mounted within the intermediate portion of the strip, said bolts constituting meansfor engaging the back faces of the blackboards to hold them against backward displacement, and means for hol'd- "f ing the lbolts against retrograde movementV subsequent to adjustment. y

7. The combination uwith blackboards having meetingedges, of afstrip back of said edges extending longitudinally thereof, said strip including an elongated piece of metal, a Supporting hook adjacent one end thereof for engaging and supporting the lower edges of the blackboard7 a clamp connected to the upper end of the strip for engaging and holding the upper edges of the blackboard, and

means adjustably lmounted on the strip -for engaging the back faces of the blackboard t0 hold them against backward displacement 10 relative to each other.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

GEORGE G. ALBERT. 

